Engine.



Patented Feb. 26, |90I. H. MAcLAURY.

ENGINE.

(Application led Nov. 92, 1900.)

'(Nu Model.)

: r x I n I I n I x l I l r Il I i r l I l l n '7. Y

No. 668,822. Patented mi, ze, 190|. H. MAcLAUBY ENGINE.

' (Application led Nov. 22, 1900A ma Moden.) 2 sham-snm z.

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HENRY MACLAURY, OF PHILADELPHIA, PENNSYLVANIA.

ENGINE.

SPECIFICATION forming part of Letters Patent N o. 668,822, datedFebruary 26, 1901.

Application led November 22,1900. Serial No. 37,336. (No model.)

To a/ZZ whom, it may concern:

Be it known that 1, HENRY MACLAURY, a resident of Philadelphia,in thecounty of Philadelphia and State of Pennsylvania, have invented certainImprovements in Rotary Engines, of which the following isaspecification.

This invention comprises a revoluble shaft or member having` means forreceiving the impact or thrust of successively-actuated pistons operatedby steam, gas, or air, the pistons impinging against bosses or teethhaving a definite relation upon a drum or wheels, to which rotarymotion' is transmitted thereby. The cylinders employed for actuating thepistons are mounted so as to oscillate in order to permit thepiston-rods to clear the bosses in their backward strokes, as well asfor the purpose of opening and closing the ports by which the steam,air, or gas performing the work may be admitted and expelled.

In the accompanying drawings, Figure 1 is a side elevation, partially insection, of a rtary engine involving my invention. Fig. 2 is a planView, partially in section, of the construction illustrated in Fig. l.Fig. 3 is a side elevation, partially in section, illustrating amodification of the mechanism for actuating the piston-rods; and Fig. 4is a side elevation, partially in section, of a further modification ofthe mechanism for operating the piston-rods.

As illustrated in the drawings, the drivingshaft 1, journaled insuitable bearings 2, carries the drum 3, having a number of sets ofbosses or teeth 4 4 4 thereon, the respective sets of bosses having suchdefinite relation with respect to each other as to cause the piston-rodsto act upon them in successive 0rder, as will hereinafter appear. Thepistonrods 5 5 5, which impinge against the corresponding sets of bosses4 4 4", are actuated by the pistons, as 6, of the cylinders 7 7 7", thecylinders being mounted to oscillate independently in bearings 8 8 8".In their respective forward strokes the pistonrods 5 5 are held inelevated positions by the balance of the respective cylinders, whichvmay be supplemented by springs, as 9, thus engaging the vertical facesof thecorresponding bosses. In their respective backward strokes thesepiston-rods are heldin depressed position, owing to the fact that' theboss succeeding that which each has engaged bears upon the top of thecorresponding rod.

The mechanism shown in the drawings is adapted for the use of steam. Thecylinders are provided with ports, as 10, which register alternatelywith inlet-ports, as 11, of the steam-chest 12, having a steam-supplypipe 13, or with outlet-ports, as 17, communicating with theexhaust-steam chest 18, having the exhaust-pipe 19 leading therefrom.When a piston, as 6, is in its initial position ready for the forwardstroke, the ports 10 and 11 being in registration, steam is admitted tothe cylinder 7 and the rod 5 is driven forward, carrying with it theboss 4 and rotating the shaft l. When a piston-rod, as 5, has completedits forward stroke, its depression by the boss 4" succeeding that withwhich its end engages has brought the port of the cylinder 7 intoregistration with the port of the exhaust-chamber 1S, upon which thepistonrod is returned to its initial position and the cylinder-port isreturned to registration with the port of the steam-chest 12. It will beseen that as the ports are controlled by the oscillations of thecylinders and as these oscillations are controlled by the relativepositions of the bosses which depress the piston-rods the successiveimpacts or strokes are obtained by arranging the bosses of each set inadvance ot' those of the next set.

The pistons may be returned to the initial positions by means of springs15'15", having their forward ends bearing against yokes lb 16 16/l andtheir rear ends bearing against the respective pistons.

As shown in Fig. 3, the pistons may be returned to the initial positionsby providing the cylinders with steam-ports, as 17/, which connect thefront part of such cylinders alternately with a steam-inlet port 18 ofthe steam-chest and a steam-outlet port'19, comm unicating with theeXhaustchamber 20. With the mechanism in the position shown, the ports10 and 11 being in registration and the ports 17 and 19' being inregistration, the piston-rod 5 will be driven forward. By this forwardstroke the ports l0 and 17 are brought into registration, as are alsothe ports 17' and 18", upon which the piston-rod will be returned to itsinitial position.

As shown in Fig. 4, a port 21 connects the IOO front part of the pistonwith a port 22 of the steam-chest 12, these ports beingin constantregistration and the front part of the piston 23 being under constantsteam-pressure. As the rear of the piston 23 is of greater area than itsfront, the piston will be driven forward when the ports and 11 are inregistration and driven back when the ports 10 and 17 are inregistrationv In this case a steam-spring, comprising a cylinder 24,communicating with the steam-passage 21 and having a plunger or piston25 therein impinging upon a bearing 26, acts to elevate the pis-Ifon-rod.

Having thus described my invention, I claim- 1. In a rotary engine, arevoluble shaft, a drum or Wheel on said shaft having bosses or teeththereon, and a cylinder having a piston and piston-rod adapted tooscillate, said shaft being driven by the engagement of said piston-rodwith said bosses and said cylinder being oscillated by the engagement ofsaid bosses with said piston-rod, substantially as specified.

2. In a rotary engine, a revoluble shaft, a

drum or Wheel on said shaft having a plurality of sets of bossesthereon, in combination with a plurality of cylinders having pistons andpiston-rods adapted to oscillaie independently, said drum and shaftbeing driven by the engagement of said piston-rods with said bosses andsaid cylinder being oscillated alternately by the engagement of saidbosses Wi th said piston-rods, subst-an tially as specified.

3. In a rotary engine, a revoluble shaft, a drum or Wheel xed on saidshaft having a plurality of sets of bosses arranged in successive orderthereon, in combination with a plurality of cylinders having pistons andpiston-rods adapted to oseillate independently, and inlet and exhaustpassages for said cylinders alternately opened and closed by saidoscillations, substantially as specified.

In witness whereof I have hereunto set my hand this 21st day ofNovember, 1900.

HENRY MACLAURY.

Witnesses:

JOHN THIEL, C. N. BUTLER.

